Ultrafast Fabry–Perot fiber-optic pressure sensors for multimedia blast event measurements

Abstract

A shock wave (SW) is characterized as a large pressure fluctuation that typically lasts only a few milliseconds. On the battlefield, SWs pose a serious threat to soldiers who are exposed to explosions, which may lead to blast-induced traumatic brain injuries. SWs can also be used beneficially and have been applied to a variety of medical treatments due to their unique interaction with tissues and cells. Consequently, it is important to have sensors that can quantify SW dynamics in order to better understand the physical interaction between body tissue and the incident acoustic wave. In this paper, the ultrafast fiber-optic sensor based on the Fabry-Perot interferometric principle was designed and four such sensors were fabricated to quantify a blast event within different media, simultaneously. The compact design of the fiber-optic sensor allows for a high degree of spatial resolution when capturing the wavefront of the traveling SW. Several blast event experiments were conducted within different media (e.g., air, rubber membrane, and water) to evaluate the sensor's performance. This research revealed valuable knowledge for further study of SW behavior and SW-related applications.

3D reconstruction of temperature field using Gaussian Radial Basis Functions (GRBF)

“…We can see two typical examples as follows: Suitable sensors and their setup in real world are of great significance to the 3D temperature field reconstruction. Here we proposes using a novel distributed optical fiber sensing system for real-time monitoring and optimization of spatial and temporal distributions of high temperature profile [14][15][16][17]. Such distributed fiber sensors can survive high temperature and the optically generated acoustic signals can measure the even higher temperature distribution where the fibers do not reach.…”

Advanced fiber-optic acoustic sensors

“…There are many demonstrations of extrinsic FPIs for pressure and acoustic sensing using optical fibers [20][21][22][23][24][25][26]. A summary of these works reported up to 2011 can be found in [27].…”

Miniature All-Silica Microbubble-Based Fiber Optic Fabry-Perot Pressure Sensor with Pressure Leading-In Tube

“…Recently, the miniature all-silica fiber optic FP sensors based on microcavity or microbubble have attracted much interest [8][9][10][11][12][13][14][15][16]. Ma et al [17] fabricated a compact FP pressure sensor based on a single-mode fiber (SMF) tip microcavity for high-pressure measurement.…”